Merge pull request #28 from Shoaib19/Shoaib019

query solved

Author: Shoaib19

MYSQL/user_name_and_count_of_invoices.sql

@@ -1,4 +1,37 @@
-Write an SQL query to find username and count of invoices from user and invoice table.
+-- Write an SQL query to find username and count of invoices from user and invoice table.
 
-Return the result table in any order.
-# Write your MySQL query statement below
+-- Return the result table in any order.
+--  Write your MySQL query statement below
+-- create a table
+CREATE TABLE user (
+  id INTEGER PRIMARY KEY,
+  name TEXT NOT NULL,
+  gender TEXT NOT NULL
+);
+
+CREATE TABLE invoice (
+  id INTEGER PRIMARY KEY,
+  name TEXT NOT NULL,
+  total INTEGER NOT NULL,
+  user_id INTEGER,
+ FOREIGN KEY (user_id) REFERENCES user(id)
+);
+-- insert some values
+INSERT INTO user VALUES (1, 'Ryan', 'M');
+INSERT INTO user VALUES (2, 'Joanna', 'F');
+INSERT INTO user VALUES (3, 'Saul', 'M');
+INSERT INTO user VALUES (4, 'Norma', 'F');
+
+INSERT INTO invoice VALUES (1, 'backery', 99,1);
+INSERT INTO invoice VALUES (2, 'meat', 88,1);
+INSERT INTO invoice VALUES (3, 'candy', 77,3);
+INSERT INTO invoice VALUES (4, 'soaps', 66,4);
+INSERT INTO invoice VALUES (5, 'meat', 55,2);
+INSERT INTO invoice VALUES (6, 'candy', 44,2);
+INSERT INTO invoice VALUES (7, 'soaps', 33,2);
+-- fetch some values
+SELECT user.name , COUNT(*) as count
+FROM user 
+INNER JOIN invoice ON user.id = invoice.user_id
+GROUP BY user.id
+HAVING COUNT(*) > 1;